<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>找到和为给定整数的三个连续整数</title>
</head>
<body>
  <script>
    function fn(num) {
      if (num % 3) return [];
      return [num / 3 - 1, num / 3, num / 3 + 1];
    }
    console.log(fn(33))
  </script>
</body>
</html>